root / lab4 / .minix-src / include / ddekit / pgtab.h @ 14
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| 1 | 13 | up20180614 | /*
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| 2 | * \brief Virtual page-table facility
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| 3 | * \author Thomas Friebel <tf13@os.inf.tu-dresden.de>
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| 4 | * \author Christian Helmuth <ch12@os.inf.tu-dresden.de>
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| 5 | * \date 2006-11-03
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| 6 | */
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| 7 | |||
| 8 | #ifndef _DDEKIT_PGTAB_H
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| 9 | #define _DDEKIT_PGTAB_H
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| 10 | |||
| 11 | #include <ddekit/ddekit.h> |
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| 12 | |||
| 13 | #include <ddekit/types.h> |
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| 14 | |||
| 15 | /* FIXME Region types may be defined by pgtab users. Do we really need them
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| 16 | * here? */
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| 17 | enum ddekit_pgtab_type
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| 18 | {
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| 19 | PTE_TYPE_OTHER, PTE_TYPE_LARGE, PTE_TYPE_UMA, PTE_TYPE_CONTIG |
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| 20 | }; |
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| 21 | |||
| 22 | |||
| 23 | /**
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| 24 | * Set virtual->physical mapping for VM region
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| 25 | *
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| 26 | * \param virt virtual start address for region
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| 27 | * \param phys physical start address for region
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| 28 | * \param pages number of pages in region
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| 29 | * \param type pgtab type for region
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| 30 | */
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| 31 | void ddekit_pgtab_set_region(void *virt, ddekit_addr_t phys, int pages, |
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| 32 | int type);
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| 33 | |||
| 34 | |||
| 35 | /**
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| 36 | * Set virtual->physical mapping for VM region given a specific size in bytes.
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| 37 | *
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| 38 | * Internally, DDEKit manages regions with pages. However, DDEs do not need to tangle
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| 39 | * with the underlying mechanism and therefore can use this function that takes care
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| 40 | * of translating a size to an amount of pages.
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| 41 | */
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| 42 | void ddekit_pgtab_set_region_with_size(void *virt, ddekit_addr_t phys, |
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| 43 | int size, int type); |
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| 44 | |||
| 45 | |||
| 46 | /**
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| 47 | * Clear virtual->physical mapping for VM region
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| 48 | *
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| 49 | * \param virt virtual start address for region
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| 50 | * \param type pgtab type for region
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| 51 | */
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| 52 | void ddekit_pgtab_clear_region(void *virt, int type); |
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| 53 | |||
| 54 | /**
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| 55 | * Get physical address for virtual address
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| 56 | *
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| 57 | * \param virt virtual address
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| 58 | *
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| 59 | * \return physical address
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| 60 | */
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| 61 | ddekit_addr_t ddekit_pgtab_get_physaddr(const void *virt); |
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| 62 | |||
| 63 | /**
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| 64 | * Get virtual address for physical address
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| 65 | *
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| 66 | * \param physical physical address
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| 67 | *
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| 68 | * \return virtual address
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| 69 | */
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| 70 | ddekit_addr_t ddekit_pgtab_get_virtaddr(const ddekit_addr_t physical);
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| 71 | |||
| 72 | /**
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| 73 | * Get type of VM region.
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| 74 | *
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| 75 | * \param virt virtual address
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| 76 | |||
| 77 | * \return VM region type
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| 78 | */
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| 79 | int ddekit_pgtab_get_type(const void *virt); |
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| 80 | |||
| 81 | /**
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| 82 | * Get size of VM region.
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| 83 | *
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| 84 | * \param virt virtual address
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| 85 | *
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| 86 | * \return VM region size (in bytes)
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| 87 | */
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| 88 | int ddekit_pgtab_get_size(const void *virt); |
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| 89 | |||
| 90 | #endif |